NPIMap

Individual provider Active NPI

Mark E Willcox, M.D.

  • Clinical Cardiac Electrophysiology Physician
  • Anchorage, AK
National Provider Identifier
1336395599
Registry record updated Jan 14, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Clinical Cardiac Electrophysiology PhysicianTaxonomy code 207RC0001X
License
110882 Issued in AK
Practice address
3841 Piper St
Suite T-100
Anchorage, AK 99508-4624
Phone
(907) 561-3211
Fax
(907) 562-7547
NPI assigned
Aug 7, 2008
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jan 14, 2026

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Clinical Cardiac Electrophysiology Physician 207RC0001X 110882 AK Primary
Cardiovascular Disease Physician 207RC0000X 110882 AK

Addresses

Primary practice location

3841 Piper St
Suite T-100
Anchorage, AK 99508-4624

Mailing address

3841 Piper St Ste T100
Anchorage, AK 99508-4674
Phone (907) 561-3211

Other identifiers 1

IdentifierTypeStateIssuer
1649761MedicaidAK

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in AK, TX2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20160812000443 AK Practitioner - Cardiac ElectrophysiologyPractitioner - Cardiovascular Disease (Cardiology) 4183817034 Reassigns benefits to 2 organizations
I20161010002122 TX Practitioner - Cardiac Electrophysiology 4183817034 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Cardiac ElectrophysiologyAlso: Cardiovascular Disease (Cardiology)
Education
Georgetown University School of Medicine, 2007
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Alaska Heart InstituteGroup PAC ID 2668371469, 58 clinicians

Practice addresses (Care Compare)

3200 Providence Dr
Anchorage, AK 99508-4615
Phone (907) 562-2211

3841 Piper St
Suite T100
Anchorage, AK 99508-4674
Phone (907) 561-3211

4315 Diplomacy Dr
Anchorage, AK 99508-5926
Phone (907) 563-2662

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
100 of 100Reported as group
Quality
91.39
Promoting interoperability
95
Improvement activities
40
Cost
100

Merit-based Incentive Payment System (MIPS)

Final score
88.88 of 100Reported as apm
Quality
71.03
Promoting interoperability
100
Improvement activities
40

Merit-based Incentive Payment System (MIPS)

Final score
70.59 of 100Reported as group
Quality
83.37
Promoting interoperability
100
Improvement activities
40
Cost
16.65

Procedures performed for Medicare patients

ProcedureNumber of procedures
Pacemaker insertion or repair150

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
110882AKMDCardiovascular Disease Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Alaska Heart Institute CurrentSince Aug 29, 2016 Accepting new patients
Alaska Native Tribal Health Consortium CurrentSince Aug 29, 2016 Accepting new patients
Providence Health & Services Washington CurrentSince Aug 31, 2016 Accepting new patients
Providence Health & Services Washington Current Accepting new patients
Alaska Heart Institute Cardiovascular Disease CurrentSince Aug 29, 2016 Accepting new patients

Locations

2751 Debarr Rd
Ste B200
Anchorage, AK 99508

3841 Piper St
Ste T100
Anchorage, AK 99508
Phone (907) 550-2233

4315 Diplomacy Dr
Anchorage, AK 99508
Phone (907) 729-1729

3200 Providence Dr
Anchorage, AK 99508
Phone (907) 261-3111

1915 E Rezanof Dr
Kodiak, AK 99615
Phone (907) 486-3281

Organizations & group practices 5

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

Hospital & facility affiliations 23

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

View all 23

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1218067200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1768348800000",
    "number": "1336395599",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3841 PIPER ST STE T100",
            "city": "ANCHORAGE",
            "state": "AK",
            "postal_code": "995084674",
            "telephone_number": "907-561-3211",
            "fax_number": "907-562-7547"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3841 PIPER ST",
            "address_2": "SUITE T-100",
            "city": "ANCHORAGE",
            "state": "AK",
            "postal_code": "995084624",
            "telephone_number": "907-561-3211",
            "fax_number": "907-562-7547"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLCOX",
        "first_name": "MARK",
        "middle_name": "E",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2008-08-07",
        "last_updated": "2026-01-14",
        "certification_date": "2026-01-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RC0001X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Clinical Cardiac Electrophysiology",
            "state": "AK",
            "license": "110882",
            "primary": true
        },
        {
            "code": "207RC0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Cardiovascular Disease",
            "state": "AK",
            "license": "110882",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "1649761",
            "state": "AK"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Anchorage, AK

Sources for this page

Verify at the official NPI Registry.